How to write a better Regex with OR patterns in Javascript

Question

I need a regex which should validate a value which

I did this regex which seems to working but I believe there is a better way of writing this. This is my regex. Please suggest a better way

(^[0-9]{3}$)|(^0[0-9]{3}$)|(^[0-9a-zA-Z]{5}$)

You said "alpha numeric value with length 5" but your regex only allows numbers? — k.tten
– k.tten, Commented Oct 26, 2022 at 23:40

bobble bubble · Accepted Answer · 2022-10-26 23:47:44Z

4

Using an optional 0 can make it shorter and also change to the alphanumeric in the end:

/^(?:0?\d{3}|[a-z\d]{5})$/i

See this demo at regex101 (pattern is already in delimiters with i flag for ignoring case)

answered Oct 26, 2022 at 23:47

bobble bubble

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Comments

Naveed · Accepted Answer · 2022-10-26 23:58:07Z

0

here is one way about it

/^(0?\d{3}|[\D\d]{5})/

answered Oct 26, 2022 at 23:47

Naveed

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